Gauge



oct. 2, 192s. 1,686,319-

' G. B. GALLASCH GAUGE l Filed Sept. 4, .1925 3 Sheets-Sheet 1 @www1 5907576 'aZZaSc/I/ WJM is Elim/M1 Oct. 2, 1928. y 1,686,318'

' G. B. GALLASCH GAUGE Filed sept. 4, 1925 l 5 sheets-Sheet 2 gnou/Hoi: r

Patented Oct. v2, 1928.

4UNI*ren STATE/,s PATENT Lemie GEORGE KeALLAS, OF Koennsrnia', NEW YORK, Assiri-NOK TO BAU'SOH @ULONB OETIOAL COMPANY, or lK'Otniiisrim, YORK, A CORPORATION OF NEW YORK.v

GA'U GE.

Application filed September 4, 1925,. Serial NO. 5.45393.

ed 4foi-.use in determining the Correct position.

Ot' -the tools `for cutting beth inside and lOutside threads.' i

A `further .Object of the invention if; te provide a -eiinple .compact detachable forni O'f vthread pi-Ofile'gauge for .apnlicatien to various types of .Work pieces, Such 'esbelta-,

Shafts,ti 1besla`nd the like and-One by Whieh 1tis possible'to ldetermine the `proper verticalzandangular positions Of a tool with respect to lthe Workand alsO Onewhichemf bodies an Obje'etivejfor more readily deterf' mining AWhether the Iprofile of the `tool doincides Wit-hthat Offthegauge-v lo these and Otherends lthe .invention resides in certain improvements Vvand conibinations Of parts all as Willbe hereinafter' `mere fully desei-ibed, -the A-nOVel 'features being' pointed Out inthe claims at tlieend Of the Specification. In the drawings;

Figure l, `is a ;13lan rieurillustrating One forni Of thevinventionyand itsvapplieation t0 thework; f ".Figure, is aplan View 0fthegaugedev speet toithe gauge;

Figure 6, isa side elevation at rlghtangles' ie; .an end eleiiatien of; the instru-' shown in Section;

V"Figui-'e' l?, is a part Sectional Vplan ing the applieatien Ofafrnodiiied frin Of the invent-ion rFigure 8, is View st-runient shewn in Figure 7, as Viewed fr'Orn the .left thereof;

Figure 9, is a Viewy Similar tO Figure 8,' lookingy at-fthe OppO'siteSi'deof the instrument and Showing the toolV in adjusted pOSitiQn apen the gauge;

inelevation Of the @um Shown-.1n Figure. 5 mui-the Objeeave.

F nire l0, is 4an enlargedfragmentary plan Y Sei that Siinilarto Figure-7 with fe'eiftai'n parte Shown in seetien; v 7

Figure 1.15 is a .fragmen nivSectional elevation 'taken en line lflaeill `Of .Figure 7 yFigure l2), is a fragmentaryelevation illustrating the use @fan attaelixnentfer the strumentehewn in .Figure .8 adapted forlaeeoininodating it tO ,relatively ilarfger Size 'W'Ork pieeee 4and i .Figure 13, 5a v perspeetiie yieivbf the .attaelnnentsh'oiyn Figure 1 2.

VSimilar reference:numerals tlcuglieut the several viewe indica-te the Same parte. v

Hereto'fore there has 4been no satisfactory method f determiningfhileil@ teplfition and Correct prOvfileO ya 'Libre ad-Outtin'e; tOOll Or its angle Wlth respeettofthe Worn. The preel ent lnventlonhas been designedte aOrdeonyenient and accurate ineans :for indient-ing when the cutting' point of, the tOOlliS centrally located with respectft the airis O fthe .Shaft or vbar tO be eut and when the prefileeithe properangjle relativetOthewoi'l, Or in Other Words vwhen a linebiseetingthe .nOSeQi the 'tO'Ol'OOrrespOnde tO that Of a Standard thread l aswell as when the tool-itself is'lield at .the

butter is.y at right angl-es .tO the axis4 Of thev I Screw. The life and interchangeability of the threads of rnanufaetured parte depends largely upon. the accuracy, of the niethdds`| einploye'dfincutting .thethreads;y It is Well known that threaded; .artenot having aeciil rately vmatched threadfssOOn. beceine llOOse,

- particularly in vInaehines7 Where the .Screw holding` parte are .subjected tO `reonteiderable etrainun'der excessive-Vibration as inthe ease yof automobiles and other -lrnotor'driven inaehines.

' TO .satisfy the needfor` iniprevedvnieans for overcoming. the Obleetlqns pointed ,ent,abeve I have provided Satisfactory means for accoinplishing the results desired in the form of the inventionA shownV and described herein.

` Referring to the drawings l have shown in Figures 1 to 6 inclusive, one form of the invention embodying aV V-shaped frame orV bracket 10, the' legs 11 and 12 of which. are adapted to receive a work piece V18 as best shown in Figure 5. The bracket is secured upon the work piece by an adjustable arm 14 y having a clamping screw 15 for engaging the ,work at the opposite side from the bracket.

The arm 14 is slotted at its inner end as at 16 to receive a clamp screw 17 which is threaded into the leg 12v of the bracket. v rlfhe slot 16 permits thearm 14 to be adjusted inwardly or Vthe plate being disposed in a outwardly according to the size of the work piece upon which the threads are to be cuty The bracket 10 is provided with a thread profile platev 18 remo-vably secured to the bracket by means of screws 19, the top face of plane bisecting the angle between the legs 11 and12 of the nose or profili-ng portion 22 of a tool 28 for lcutting outside threads,the correct applicabracket so that for all positions of the rod or shaft 13 within the bracket, the upper surface of said plate will lie in saidplane. The plate 18 is provided both with inner and outer properly formed thread profile notches 2O and 21, respectively, as' shown in Figures 8 and 4. Thefouter notch 21 is adapted to' receive the .j tioni'of the tool being shown in Figures 1 and by which to determine when the profile plate 18 is accurately adjusted to a horizontal position, this being indicated when 'the bubble 28 is in the center of the glass as shown in Figure 1.

The magnifying lens 29 is carried by an apertured holder 30 threaded into a sleeve 31V` slidably .disposed for longitudinal adj ust-.

nientV in a split ring 32 shown in Figure 6.

The is carried` by an arm 83 pivotally mounted upon a vpost'34 extending upwardly fromthe bracket 10 and rigidly secured thereon by'a screw 35V as shown in Figure 5. The arm is slotted or recessed at 38`to receive a stop pin 89 projecting laterally from the post int-o said slot, the latter vbeing of such a length as to limit the swing of the eye piece or objective between the positions indicated in Figures 1 and 2 whereby the optical axis of theobjective is readily brought into coincidence fwith either of two predetermined points lyingV within and centrally disposed withv re-l plate.

Vhorizontal position.

spect to the notches .2O and 21 of the profile In this connection the only adjustment requiredv for centering the Vobjective over the notches is to swing it from one eX- treme position to another.

The shaft 13 on which the threads are to be cut may be supported forv rotation with respect to the tool inanysuitable manner, in a lathe between Jthe head and tail-stocks thereof, indicated respectively at 40 and 41 in Figure 1,-the lathe having a longitudinal slide 42 carrying a transverse slide 43 provided with a slotted tool post 44 in which the tool 23 is ad- Y justably held whereby it may be moved vertically and adjusted angplarly with respect to the work as desired. t

It will be understood `that the notches 2O and 21 are formed to perfectly represent the correct proleof a standard thread which may be one having a 600 angle or any other angle desired, so that when the nose of the tool is inserted within the notch and observed under kthe magnifying glass as it approaches the position indicated either in Figures 3 or 4 it is possible to determine whether or not it is 'profiled to conform to the standard profile of the gauge plate shown.

Y ln the operation of the device described above the gauge is clamped upon the work and in any posit-ion to whichv it may be adjusted the top surface of the gauge plate 18 will lie in a plane'intersecting the aXis of' the shaft. The work is then rotated until the bubble 28 is at the center ofthe glass,

thus indicating that the gauge plate'is in av The tool is thenadjustcd so that the top surface of the profiling end thereof is flush with the top surface of the plate whereby to insure that when the tool is moved over into contact-with the shaft 13, as indicated by dot and dash line in Figof or midway between the top and bottom an d will continue to operate in this position while being moved through advancement of the slide 42. As stated above thev profile notches of the gauge plate not only determine whether the profile or the cutting portion of the tool is properly formed but also afford' means for positively and accurately positioning the'tool at the correct angle with respect to the' axisV of the screw. The gauge abovedescr'ibed, as will be understood, may'also be used for checking and setting an inside thread-cutting tool, such as, that shown in Figures2 and 3, where the tool is adapted to operate within a pipe or tubular member; When the tool has been properly adjusted the gauge may be quicklyremoved by loosening the clamping screw 15., after which the slide 43 is moved to bring` th-e tool into engagement with the work, theslide 42 being employedto yadvance the tool during the cutting operation.v

The modification shown in Figures 7 to 13 inclusive is adapted' for use in, connecure 1, it will engage the shaft centrally therelil() gauge is slidably mounted.

Theap'plication f this form of the *invention vis clearly indicated in Figure 7 showing a tubular 'Work piece 45 held by a'chuck 46. In this modification a rod 47 of any desired l length is employed as a't-rack onl which is Wall of the tube.

slidably mounted a'gauge block 48 having lan arm 49 projecting `frompone corner` thereof for engagement With the inner surface 50 of the tube 45, represented by the dot and dash line l'in Figure 8. The rod is provided at voneend with a sleeve l52 having a yieldable arm 53 of spring material arranged toi pro jectfinto the tubular Work piece 45 and provided Witha bearing portion adaptedto Contact Withthe Wall of the tube asshoWn in Figures 7`and IO. 'I he sleeve is: prevented from turning upon the rodbya pin55 pro jecting into aslot 56 'extending preferably the full length ef the rod.` 'A pin 57 is disposed in the path of the pin 55' to limit the outward movement ef the sleeve whereby to prevent accidental displacement ofthe same. An adjusting screw 58 is 'threaded through the 'end of the sleeveto'engage theend'of the rod forlproducing relative movement between the arms 49 'and 58 whereby to clamp the `instrument in the position slioivnin Figure 10, it being understood that'a rough'adjustment is first made by sliding the block48 unt-il the approximate'distance desired betweenfthe arnisis afiforded 1When this has'been dene the block is clamped in position upon the rod by a screw 59,'theinner end of which engages a key 60=loosely mounted in the slot 56 and adapted to ti' "el with the block. The arms being'insertediivithin the tube, the screw 58 adjusted te move the arn .58 outwardly into yielding and clamping engagementiviththe Theeut'er'face' $1 of the arm 'V49 is disposed at arightangle to .therod 47and due to theA curvature of the tube said arm Will engage the inner face thereof at tivo points, namely, at the corners of the section, as indicated at 62 and 63 in Figure?. In this Way the center of the rod is made to intersect the axis of the tube no matter in what position the gauge is adjusted. Y v 1 An adapter 64 is provided, having a slot 65 therein for receiving the arm 49 in cases Where the gauge is'to be used with relatively large size tubular Work pieces as shown in Figure 12. In this figure the circle indicated by the dot and dash line 66 represents the in#V ner diameter of'such a tube, the adapter engaging the latter at tivo points as indicated fit/67 and 68.v This arrangement, like that shown in Figures Sand 9, Will cause the center of the rod47 to intersect the center of the tube in Whatever' position of adjustment the,l Y

gauge may be placed." In this ease the gauge plate,1nd1cated at 69, 1s secured to the block 48 by .screws 70 and 1s-so positioned uponthe block that its lupper surface Will coincide with A.

the horizontal axis of the rod 47 as shown in Figure 9, whereby said upper surface -Will also lie in a plane intersecting the axis' of the tube upon Which the instrument is mounted;

The inner and outer tool receiving notches are indicated at 7l and 72 respectively,as best shoi'vnin Figure 10, and are-'accurately formed to correspond to the profile of a standard thread, such asflone having 'aGOO angle. y Y

The slidebloc'k 48 carries an iipstanding post 73 having` an arm 74 terminating' in a split ring 74"V carrying a longitudinally ad# justable eye piece or objective 76 similar to that shovvnin Figure G,- the farm bei'ngadapt` ed to swing upon the post. The swinging movement of the lobj ective is limited apin 77 on the 'pest y73 which projects into a slt 7 8 of the ar1n,the length o'f'ivhich is suchasto n provide for a proper centering of the objective overthe notches 71 and 7 2 When-the objective is'in Vitsv extreme `positionsr of. adjust nient, one of which is shown in V'Iiigur'e A level7 9 is carriedby the slidelblock'to indicate, through the positionof the Abubble 8G, when theupper surface ofthe gauge plate 69 is horizontally disposed ina plane inter 'secting the aXis of theftubular workpiece.

upon'the bracket for determining the-'proper angle, of af-tlirea'd-cutti teol ivith -.respect bracket adapted eating when said'l'ast mentioned means is ad vjusted fto'Jv a predetermined position upon the shaft. Y Y I 2. A gauge comprising a bracket adapted for connection with a shaft or tube, means for determining when the bracket is in a prede-` termined'position upon` the shaft andy means carried by the bracket for determiningthe proper angle of -a thread-cutting tool With' respect to the axis of the shaft. Y

3. A gauge comprising a bracket adapted for connection with a shaft' or tube upon Whieh'threads are to be cut, a plate carried by the .bracket having a thread profileV notch corresponding tothe profile of a standard thread and having a surface adapted in any adjusted position of the bracket upon the shaft to lie in a plane intersecting the axis thereof, said Y notch being adapted to receivethe nose of-a thread-cutting tool, the correct angle of which with respect to the shaft is determined byadjusting the tool to occupy a prede-ter- Y mined position with respect to said surface.

. 4. A gauge comprisinga bracket having Y parts for engagement with the inner surface of a tube whereby the bracket is supported by the tube and means upon the bracket foi1 determiningthe proper angle of a threadcutting tool with respect to the axis of the tube.

5. A gauge vcomprising a bracket having parts for engagement with the inner surface of a tube upon which threadsare to be out whereby the bracket is supported by the tube and a plate carried by the bracket having a thread profile notch .corresponding to 'the profile of a standard thread, said plate having a surface adapted in any adjusted position of the bracket to lie in a plane intersecting the axis of the tube, said notch being adapted to receive the nose of the threadcutting tool,the correct angle of which with respect tothe axis of the tube is determined by adjusting the tool to occupy a predetermined position with respect to said plate surface.

6. A gauge comprising a. bracket adapted for connection with a shaft or tube,`a level carried bythe bracket for determining when the latter is in a predetermined position upon the shaft, a plate upon the bracket havingk a thread profile notch formed therein for receiving'a thread-cutting tool whereby to de-` termine-when the lattter isfin a predetermined position with respect to the shaft and an objective upon the bracket adapted to overlie said profile notch. j

7. A gaugefcomprising a bracket adapted for connection with a shaft or tube, a plate upon thebracket having separa-tel thread profile notches each adapted to receive. .the nose of a thread-cuttingtool for determining when the latter is in either of two predetermined positions with'respect to the axis of the tube, and an objective upon the bracketmovable to overlie each of said notches.

8. A gaugecomprising a bracket` adaptedV for connection with a shaft or tube, a vplate upon the bracket having separate thread' proupon which threads are to be cut, whereby to secure the support upon the vshaft or vtube and means carried by one of the adjustable parts for cooperation with a thread-cutting tool to determine when the latter is 'adj usted to a predetermined angle With respect to the axis of the tube.

10. A gauge comprising a support includv ing relatively movable parts arranged to en 'gage opposite portions of a shaft or tube upon which threads are tobe out, adjustable means adapted to clamp said relatively movable parts upon shafts or tubes ofditferent, diam# -eters and a thread profile notch formed in one of said parts for receiving the nose of a thread-cutting tool to determine when the latter is adjusted to a predetermined angle with respect to the axis of the tube.

1l. A gauge comprising aY rod, a block adjustable longitudinally upon the rod and having a member adapted to engage the inner face of a tube, an arm carri-ed 'by the rod adapted to engage the inner face of the tube in spaced relation to said member and means upon the block having a thread prole notch for receiving the nose of a thread-cutting tool to determine when the latter is adjusted to a prdetermined position with respect to the tu e.

12..A gauge comprising a support having relatively adjustable parts l arranged for clamping engagement with opposing surfaces of a shaft or tube on opposite sides'of the axis thereof, one of said parts having a tool positioning portion and means upon the sup I port for indicating when said tool positioning portion is adjusted to a horizontal position.

GEORGE B. GALLASCH. 

